mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Dave Chinner
2529c9486a
Fully scripted conversion, see script in initial SPDX license commit message. tests/xfs/044 was hand massaged to remove duplicate copyright and divider lines before running the script. Signed-off-by: Dave Chinner <dchinner@redhat.com>
108 lines
3.1 KiB
Bash
Executable File
108 lines
3.1 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2016 Red Hat, Inc. All Rights Reserved.
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#
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# FS QA Test No. 306
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#
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# Regression test for an XFS multi-block buffer logging bug.
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#
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# The XFS bug results in a panic when a non-contiguous multi-block buffer is
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# mapped and logged in a particular manner, such that only regions beyond the
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# first fsb-sized mapping are logged. The crash occurs asynchronous to
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# transaction submission, when the associated buffer log item is pushed from the
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# CIL (i.e., when the log is subsequently flushed).
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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cd /
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rm -f $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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# Modify as appropriate.
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_supported_fs xfs
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_supported_os Linux
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_require_scratch_nocheck # check complains about single AG fs
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_require_xfs_io_command "fpunch"
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_require_command $UUIDGEN_PROG uuidgen
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rm -f $seqres.full
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# Create a small fs with a large directory block size. We want to fill up the fs
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# quickly and then create multi-fsb dirblocks over fragmented free space.
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_scratch_mkfs_xfs -d size=20m -n size=64k >> $seqres.full 2>&1
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_scratch_mount
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# Fill a source directory with many largish-named files. 1k uuid-named entries
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# sufficiently populates a 64k directory block.
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mkdir $SCRATCH_MNT/src
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for i in $(seq 0 1023); do
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touch $SCRATCH_MNT/src/`$UUIDGEN_PROG`
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done
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# precreate target dirs while we still have free space for inodes
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for i in $(seq 0 3); do
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mkdir $SCRATCH_MNT/$i
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done
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# consume and fragment free space
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$XFS_IO_PROG -xc "resblks 16" $SCRATCH_MNT >> $seqres.full 2>&1
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dd if=/dev/zero of=$SCRATCH_MNT/file bs=4k >> $seqres.full 2>&1
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$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/file >> $seqres.full 2>&1
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size=`stat -c %s $SCRATCH_MNT/file`
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for i in $(seq 0 8192 $size); do
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$XFS_IO_PROG -c "fpunch $i 4k" $SCRATCH_MNT/file >> $seqres.full 2>&1
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done
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# Replicate the src dir several times into fragmented free space. After one or
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# two dirs, we should have nothing but non-contiguous directory blocks.
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for d in $(seq 0 3); do
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for f in `ls -1 $SCRATCH_MNT/src`; do
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ln $SCRATCH_MNT/src/$f $SCRATCH_MNT/$d/$f
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done
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done
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# Fragment the target dirs a bit. Remove a handful of entries from each to
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# populate the best free space regions in the directory block headers. We want
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# to populate these now so the subsequent unlinks have no reason to log the
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# first block of the directory.
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for d in $(seq 0 3); do
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i=0
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for f in `ls -U $SCRATCH_MNT/$d`; do
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if [ $i == 0 ]; then
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unlink $SCRATCH_MNT/$d/$f
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fi
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i=$(((i + 1) % 128))
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done
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done
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# remount to flush and ensure subsequent operations allocate a new log item
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_scratch_cycle_mount
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# Unlink an entry towards the end of each dir and fsync. The unlink should only
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# need to log the latter mappings of the 64k directory block. If the logging bug
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# is present, this will crash!
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for d in $(seq 0 3); do
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f=`ls -U $SCRATCH_MNT/$d | tail -10 | head -n 1`
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unlink $SCRATCH_MNT/$d/$f
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$XFS_IO_PROG -c fsync $SCRATCH_MNT/$d
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done
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echo Silence is golden.
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# success, all done
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status=0
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exit
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